preferably in the center of a large building. away from exterior walls and glass. some friends were bunkered in their basements (which are few and far between around here). if you're driving, stop under an underpass. if you're home, get in the bathtub and cover yourself with a mattress. the one tornado i was in was about 6yrs ago. I was in a coffee shop on my computer with headphones in and a barista taps me on my shoulder and said a tornado was in downtown (about 2mi away from us). we went into the stockroom and as soon as we got back there **** hit the fan. only lasted 20sec or so, but buildings were destroyed and trees were uprooted. I don't recall anyone being hurt tho. don't **** with nature.